Evaluating archers.

Magog are good if you're playing as Kel. I'm currently playing through the "Playing with Fire" campaign, and he's leveled up well from the beginning of the campaign; 7-11 Magogs at the start of the map deal a lot of damage. I completed the entire map with them. And in general, all archers are good if the hero has special skills and artifacts that increase accuracy. They have the accuracy skill from the start.